Speed-control device



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I I 2 D .B. A. DELL.

SPEED CONTROL DEVICE.

APPLICATION FILED OCT. 10. 1919.

Patented Mar. 8, 1921.

UNITED STATES PATENT OFFICE.

SPEED-CONTROL DEVICE.

Specification of Letters Patent.

Patented Mar. 8, 1921.

Application filed October 10, 1919. Serial No. 329,669.

To all whom it may concern:

Be it known that I, BRADFORD A. DELL, a citizen of the United States, and residing at Detroit, lVayne county, State of Michigan, have invented certain new and useful Improvements in Speed-Control Devices, of which the following is a specification.

This invention relates to means for regulating and controlling the supply of the explosive mixture such as that from the carbureter to the explosion chambers on an engine. It is intended to operate as a speed governor for an internal combustion engine, and is particularly adapted for use on motor vehicles, such as trucks and other vehicles ifitrusted to employees who might be reckless in driving too fast. It may be set to limit the speed at which the vehicle is driven, operating to cut off the supply of the mixture as the speed approaches that limit. It operates automatically and one of the novel features of the device is that the control valve opens inwardly toward the discharge end of the device leading to the cylinders of the engine, and thus the vacuum created in the cylinders tends to open. the valve. Other novel features of the dev ce will be apparent from the following description taken in connection with the drawings and claims. In the drawings- Figure 1 is a vertical section through the device showing the regulating and setting mechanism and is taken on the line 1-1 of Fig. 2 looking in the direction of the arrow:

Fig. 2 is a vertical section on the line 2-2 of Figs. 1 and 2;

Fig. 3 is a vertical section on the line 3-3 of Fig. 2, showing the control valve in normally open position; and

Fig. 4 is a view similar to Fig. 3 showing the control valve closed.

The embodiment of my invention shown in the drawings includes-a casing or conduit 10 which may be made of metal, such as brass, and which includes the operating mechanism. This casing or conduit is provided at its ends with flanges 11 and 12 which may be connected to the inlet couduit 13 from the carbureter, and the lower end of the manifold 14 leading to the enginecylinders. Centrally within the conduit 10 there is a longitudinal rod 15, carried in fixed position by supports 16, 17, extending transversely and secured'to the con: duit at its ends. On this fixed rod there is move the longitudinal moving member along the rod 15 toward the discharge end of the conduit. A valve composed of two similar wings 20 and 21 is secured to the end of the sliding member 18 nearest the discharge by a pivot pin 22. These valve members 20 and 21 are thus pivotally connected at -their inner edges, and when in closed position extend forwardly and outwardly and are so shaped as to fit and practically close the passageway through the conduit, as

illustrated in Fig. 4. In normal operation of the engine not under excessive speed, the valve members 20 and 21 occupy substantially parallel position at the center, as shown 1n Fig. 3, thus permitting the free passage of the explosive mixture to the englne. The valve sections 20 and 21 have pro ecting ears 23 and 24 near the pivot pin 22, and to'these ears are pivoted arm 25, 26 WhlCh are in turn pivoted at their outer ends by pivot pins 27. and 28 to the casing or housing 10 in depressions 29 and 30 formed in that housing for the pur ose. These links 25 and 26 occupy the position shown in Fig. 3 in normal operation of the engine, but are'turned toward the position shown in Fig. F1 when the sliding member 18 is moved by the force of the explosive mlxture passing through the conduit. It is through these links that the valve members 20 and 21 are made to spread out in the butterfiy wing form in Fig. 4 to close the outlet.

A transverse shaft 31 is mounted in the housing 10 extending across between the ends of the sliding member 18 and two similar arms 32 are secured to this shaft and extend on opposite sides of the forward reduced end of the sliding member 18. They are there connected by a pivot 33 to a link 34 on each side, which is in turn connected at its other end to the pivot pin 22 of the valve. The shaft 31 'has depressions in its ends making bearing connection with the tapering screw threaded bearing supports 35, 36 which extend inward throu h the sides of the housing 10. This furnishes a to enter this groove to hold satisfactory bearing support for the shaftand permits easy turning. There is an enlarged opening 37 through one side of the housing 10, through which the shaft 31 passes, and this opening is still further enlarged at 38 on the outer side, leaving a shoulder 39. A spring 40 is secured to the shaft 31 at 41 and is then coiled around the shaft and secured at its other end 42 to a surrounding housing 43, which fits against the shoulder 39, and is adapted to turn with reference to the shaft 31. A screw cap 44 fits into the enlarged opening 38 and has screw threaded connection therewith, and serves to hold the housing 43 in place, and also to support the bearing pin 35. The housing 43 has at one point in its margin worm screw teeth 45, adapted to mesh with the screw threads 46 on the end of the rod 47, mounted in the diagonal opening 48 in the housing 10. The rod 47 has a limiting shoulder 49 and a circumferential groove 50. A screw threaded member 51 is adapted the rod 47 in proper longitudinal position, while permitting free rotation thereof. The rod 47 furthermore preferably has on.its outer end a knob or finger piece 52, by which it may be rotated. It will be observed that the turning of the rod 47 will turn the housing 43 through the bevel gear connection, and that the turning of the housing 43, will put tension on the spring 40 tending to turn the shaft 31. The spring is in actual operation normally adjusted so as to act through the shaft 31, arms 32 and links 34 to pull the sliding member 18 to the position shown in Fig. 3, where the valve is open. The actual tension may, of course, be adjusted to an desired degree by turning the shaft 47. The operation of the device will be apparent from the above description of the construction. The gaseous mixture passing through the conduit 10 will tend to move the sliding member 18 by and in accordance with its velocity,-and will thus tend to make the valve members 20 and 21 spread out on their pivot 22 to close the outlet and the rate of flow which will cause this closing will of course, depend on the adjusted tension of the spring. When the valve is closed, as shown in Fig. 4, or nearly closed, the vacuum created by the action of the engine cylinders on the discharge side will tend to make the valve members 20 and 21 fold toward each other, thus opening the conduit notwithstanding the fact that this action can not take place with out a movement of the pivot pin 22 in the reverse direction. This is because of the location of the lugs 23 and 24 which in this action constitute the fulcrums of movement. There is greater area to the sections 20 and 21 and greater leverage on the outer ends of those sections than on the inner ends, and thus they will tend to fold because of the pressure on their rear faces when there is a vacuum on their forward faces. The tendency of the valve to open under the influence of the vacuum in the cylinders is one of the things which make my device operate with ease and accuracy. Other features of construction cooperate with it toward this end. The construction furthermore is simple to make and easy to assemble, and has few moving parts to get out of order or-become clogged.

Having thus described the invention what is claimed as new and desired to be secured by Letters Patent is:

1. An automatic governor for the supply of explosive mixture to internal combustion engines, comprising a conduit forthe explosive gases, a "alve for closing said conduit and shutting off the supply to the engine so connected and arranged that a vacuum in the engine will tend to open it, means in said conduit so arranged and constructed with said valve as to automatically tend to close said valve by and in accordance with the velocity of the mixture passing through the conduit.

2. An automatic governor for the supply of explosive mixture to internal combustion engines, comprising a conduit for the explosive gases, a valve for closing said conduit and shutting off the supply to the engine so constructed and arranged that a vacuum in the engine will tend to open it, means in said conduit so arranged and connected with said valve as to automatically tend to close said valve by and in accordance with the velocity of the mixture passing through the conduit, yielding means for normally holding the valve open and resisting closing, and means for adjusting said yielding means to regulate the maximum rate of passage of explosive material through the conduit.

3. An automatic governor for the supply of explosive mixture to internal combustion engines comprising a conduit for the explosive gases, a valve for closing said conduit and shutting off the supply to the engine so constructed and arranged that the passing gases will tend to open it, operating means for said valve in said conduit in advance of said valve so arranged that the passing gases will tend to make'it close the valve'to a greater extent than the passing gases tend to open the valve, and spring pressed means tending to hold the valve open.

4. An automatic governor for the supply of explosive mixture to internal combustion engines, comprising a conduit for the explosive gases, a valve for closing said conduit and shutting off the supply to the engine so constructed and arranged that the engine will tend to said valve open, means for regulating the tension of said spring, means in said conopen it, a spring tending to hold duit in advance of said valve adapted to be moved by and in proportion to the current of explosive mixture therethrough, and connections between said last named means and valve for moving said valve toward closed position in proportion to the movement of said means. 4

5. An automatic governor for the supply of explosive mixture to internal combustion engines, comprising a conduit for the explosive gases, a normally open valve for said,

conduit composed of two similar non-rotatable members hinged together along one side and adapted to project outwardly toward the conduit and forwardly toward the discharge end at an angle their outer mar-' gins being so shaped as to fit the inner surface of the conduit when in their outer position, means in said conduit automatically controlled by the velocity of the gases for moving said members toward their outer closed position by and in accordance with the velocity.

6. An automatic governor for the supply 7 of explosive mixture to internal combustion engines, comprising a conduit for the explosive gases, a valve in said conduit consisting of a pair of wings hinged together at their inner edges centrally of said conduit pointing toward the discharge and so shaped at their outer edgesas to make contact with the inner wall of and close said conduit when spread to an angle of less than one hundred and eighty degrees, links pivoted at one end to said wings near their hinge connection and at their outer ends to the inner walls of said conduit in the rear of said hinge, a stationary central longitudinal rod in said conduit extending through the 1 joint of said valve, a sliding sleeve on ,said rod inthe rear of said valve connected to the pivot of its hinge and provided with staggered flanges extending toward the inner surface spread to an angle of less than one hundred and eighty degrees, links pivoted at one end to said wings near their hinge connection and at their outer ends to the inner walls of said conduit in the rear of said hinge, longitudinally sliding means in the rear of said valve connected to the hinge and adapted to be automatically moved forward spreading said valve wings by and in accordance with the velocity of fiow of the explosive mixture through said conduit.

In testimony whereof I aflix my signature.

BRADFORD A. DELL. 

